6504638461 has 8 divisors (see below), whose sum is σ = 6708812544. Its totient is φ = 6303205200.

The previous prime is 6504638419. The next prime is 6504638473. The reversal of 6504638461 is 1648364056.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6504638461 - 2¹⁵ = 6504605693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504638401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680385 + ... + 689878.

It is an arithmetic number, because the mean of its divisors is an integer number (838601568).

Almost surely, 2^6504638461 is an apocalyptic number.

It is an amenable number.

6504638461 is a deficient number, since it is larger than the sum of its proper divisors (204174083).

6504638461 is a wasteful number, since it uses less digits than its factorization.

6504638461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370411.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 6504638461 is about 80651.3388667541. The cubic root of 6504638461 is about 1866.6993986855.

The spelling of 6504638461 in words is "six billion, five hundred four million, six hundred thirty-eight thousand, four hundred sixty-one".